Account management validator

[OluRemiFour]

Close: #52
Updated isValidDistribution() in [src/utils/validation.ts to enforce all the requested rules:

non-empty array
every recipient must pass isValidPublicKey()
every percentage must satisfy 0 < p <= 100
total must equal exactly 100 using scaled integer math instead of float rounding
I also expanded coverage in [tests/unit/utils/validation.test.ts] for decimal splits, invalid recipients, zero/over-100 values, and non-exact totals.

Verification passed with npm run type-check and npm test -- --runInBand.

[OluRemiFour]

Done, Close: #64

[amina69]

@OluRemiFour you are suppose to push to develop not main. and was also suppose to branch of develop, it in the contributing.md...please read it before starting the project

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[OluRemiFour]

@OluRemiFour you are suppose to push to develop not main. and was also suppose to branch of develop, it in the contributing.md...please read it before starting the project

Fixed

[amina69]

@OluRemiFour checks failing